H - Electricity – 01 – C
Patent
H - Electricity
01
C
H01C 7/10 (2006.01) H01C 7/112 (2006.01)
Patent
CA 2107906
The present invention relates to a zinc oxide varistor which is provided with a varistor element 1, whose main component is zinc oxide, and at least two electrodes 2 fitted up on said varistor element 1, and a process for the production thereof. By means of diffusing the following lead borosilicate-type glass into said varistor element 1 from a surface of a fired varistor 1, the improvement in voltage nonlinearity has been accomplished, said lead borosilicate-type glass containing at least one metal oxide selected out of cobalt oxide, magnesium oxide, yttrium oxide, antimony oxide, manganese oxide, tellurium oxide, lanthanum oxide, cerium oxide, praseodium oxide, neodymium oxide, samarium oxide, europium oxide, gadolinium oxide, terbium oxide, dysprosium oxide, holmium oxide, erbium oxide, thulium oxide, ytterbium oxide and lutetium oxide.
La présente invention concerne une varistance d'oxyde de zinc qui est munie d'un élément de varistance 1, dont le principal constituant est l'oxyde de zinc, et d'au moins deux électrodes 2 fixées sur ledit élément de varistance 1, ainsi qu'un procédé pour la production de cette varistance. La diffusion du verre de type borosilicate de plomb de la composition suivante dans ledit élément de varistance 1 à partir d'une surface d'une varistance 1 chauffée, a permis d'obtenir une amélioration de la non-linéarité de la tension, ledit verre de type borosilicate de plomb contenant au moins un oxyde de métal choisi parmi les oxydes suivants : oxyde de cobalt, oxyde de magnésium, oxyde d'yttrium, oxyde d'antimoine, oxyde de manganèse, oxyde de tellure, oxyde de lanthane, oxyde de cérium, oxyde de praséodyme, oxyde de néodyme, oxyde de samarium, oxyde d'europium, oxyde de gadolinium, oxyde de terbium, oxyde de dysprosium, oxyde d'holmium, oxyde d'erbium, oxyde de thulium, oxyde d'ytterbium et oxyde de lutécium.
Katsumata Masaaki
Koyama Kazushige
Mutoh Naoki
Marks & Clerk
Matsushita Electric Industrial Co. Ltd.
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